Broadband UHF RFID tag antenna with a pair of U slots mountable on metallic objects

Design of a Wideband Inductively Coupled Loop Feed Patch Antenna for UHF RFID Tag

“…To evaluate the impedance bandwidth of the antenna, equation (1) is used to calculate the return loss of the antenna [12], [15], [16], [22], [33]. The simulated and measured return loss for both free space and mounted on metal plane is shown in Fig.…”

“…1. Several solutions to improve the impedance bandwidth of patch antenna for RFID were presented by [15][16][17][18][19]. However, the structures of the presented antennas require multi or cross-layered configuration which will add significant manufacturing cost to the antenna fabrication due to additional process required.…”

Magnetic Substrate Folded Dipole Antenna for Uhf Rfid Metal Tag

“…Much research about metal tag antennas has been reported to solve this problem. The main solutions include inserting a dielectric layer between the antenna pattern and the metal ground or even using special antenna design principles to avoid metal interference [2][3][4][5][6], but their uses are limited by the considerable prices. Recently, a series of novel RFID metal tags are proposed, for instance, tag equipped with Artificial Magnetic Conductor reported by Abu et al [7] and tag equipped with magnetic composite material reported by Kuo et al [8].…”

Design and Development of a Compact Wideband C-Shaped Patch Antenna for UHF RFID Tag

“…However, the antennas exhibit complex configuration due to crosslayered construction hence making it difficult to fabricate. Meanwhile, various types of micro strip antennas for metallic application have been proposed by Son et al (2006), Mo et al (2008), Xu et al (2008), Lu and Hung (2010), Son and Jeong (2011) and Wu et al (2011). Although the presented patch antennas are able to work on metal object, they either have narrow bandwidth or cross and multi-layered construction in their design.…”